Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8fe52cda2c92412…

MALICIOUS

PDF

41.8 KB Created: 2020-07-31 03:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 82c4eb600b52ff30c75b18e4398c7a6c SHA-1: 1e64363935999374ac01b589cc517fe8556ef0f5 SHA-256: b8fe52cda2c924123891ea82d697c08d6de5a902a3204e82bb5049ee2b5b611e
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic indicating it's a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=ccna+book+pdf+bangla'. Additionally, it features a PDF link farm with numerous links, including one to 'https://cdn.shopify.com/s/files/1/0427/5788/2022/files/66303379498.pdf'. The document body, though heavily obfuscated, contains text related to 'Ccna book pdf bangla', suggesting a lure for users seeking specific content. The presence of a visual download button heuristic further supports the deceptive nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=ccna+book+pdf+bangla In PDF document text
    • http://files.yourdfwattorney.com/uploads/1/3/0/7/130776206/menilukeriperipu.pdfIn PDF document text
    • http://files.blacklght.com/uploads/1/3/1/4/131406321/f6e8ac.pdfIn PDF document text
    • http://files.faithworks4u.com/uploads/1/3/1/1/131163684/peluvubop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5788/2022/files/66303379498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2512/9891/files/femoled.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/46552900387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2290/1663/files/dixadizixapebovuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8954/3836/files/norufowomowad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1510/0826/files/66749259291.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/pegusukerowezijomepap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/sudonikariwiwolapajerikuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/52865460903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70686619693.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/vowobawezozos.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E9 4820 bytes
SHA-256: b90f504421b6acaa3453193a548b6c6aff6a6a2e1b783bd2ece03def19c2c6db
font_01_sfnt_off00007652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7652 10288 bytes
SHA-256: 570ab4af0d44692128b54a5ff403e7c485b007c36143a9defd378ebe8733f5b9

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